Error in Questasim 6.3a during simulation

Hi,

I am using Questasim 6.3a and while simulation I got the following error can any body help to solve it
do E:/ISEproject/rahulextry/pciev1_9de2/pciexde2/pciede2ip/simulation/functional/simulate_mti.do

# ** Warning: (vlib-34) Library already exists at "work".

# Reading modelsim.ini

# "work" maps to directory work. (Default mapping)

# ** Error: (vcom-7) Failed to open -f file "board_rtl.f" in read mode.

# No such file or directory. (errno = ENOENT)

# ** Error: C:/QuestaSim_6.3a/win32/vcom failed.

# Error in macro E:\ISEproject\rahulextry\pciev1_9de2\pciexde2\pciede2ip\simulation\functional\simulate_mti.do line 4

# C:/QuestaSim_6.3a/win32/vcom failed.

# while executing

# "vcom -work work \

# -f board_rtl.f"

Thanks
Monalisha

Check "board_rtl.f" file exits in the dirctory and has read permissions